What Could Cause the Blowby??
#1
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What Could Cause the Blowby??
As the title says,
I would like to know all the possiblities for a blow by???
I have a new build engine !! it is Street Ported and pined!! the first three week it wasn't smoking but about month or 6 weeks later, it starts to smoke a little.
Whats even more wierd. I have a GT40 .88 A/R that made 284@16psi.. Not Normal AFR is 10.3-11 no matter how more boost i increase still richer it get !!!!!
also blow by.. what can causes it?????????????
any inputs from the pros.
I would like to know all the possiblities for a blow by???
I have a new build engine !! it is Street Ported and pined!! the first three week it wasn't smoking but about month or 6 weeks later, it starts to smoke a little.
Whats even more wierd. I have a GT40 .88 A/R that made 284@16psi.. Not Normal AFR is 10.3-11 no matter how more boost i increase still richer it get !!!!!
also blow by.. what can causes it?????????????
any inputs from the pros.
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Originally Posted by stylEmon
i'm no pro, but i think the ports being ported too large will cause blow-by, especailly with a big turbo.
#4
Old Fart Young at Heart
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3 possibilities. If the ports were cut too far in, the oil control rings may not be sealing. The builder may not have replaced the oil control rings and/or the oil control o-rings. The turbo oil seal may be leaking.
When does it smoke the most? On start up, then goes away, when under heavy boost or on hard decell? Each one can indicate a different source for the leak.
When does it smoke the most? On start up, then goes away, when under heavy boost or on hard decell? Each one can indicate a different source for the leak.
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Originally Posted by trochoid
3 possibilities. If the ports were cut too far in, the oil control rings may not be sealing. The builder may not have replaced the oil control rings and/or the oil control o-rings. The turbo oil seal may be leaking.
When does it smoke the most? On start up, then goes away, when under heavy boost or on hard decell? Each one can indicate a different source for the leak.
When does it smoke the most? On start up, then goes away, when under heavy boost or on hard decell? Each one can indicate a different source for the leak.
#6
Old Fart Young at Heart
iTrader: (6)
Talk to the builder and ask if the oil control rings and the oil control o-rings were replaced. Another possibility is too much oil pressure going to the turbo. The feed line usually has a jet in the feed line to reduce oil pressure, especially if you're running a high pressure oil pressure regulator.
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